/**
 * @license Copyright (c) 2003-2023, CKSource Holding sp. z o.o. All rights reserved.
 * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
 */
/**
 * @module core/editor/utils/securesourceelement
 */
import { CKEditorError } from '@ckeditor/ckeditor5-utils';
/**
 * Marks the source element on which the editor was initialized. This prevents other editor instances from using this element.
 *
 * Running multiple editor instances on the same source element causes various issues and it is
 * crucial this helper is called as soon as the source element is known to prevent collisions.
 *
 * @param editor Editor instance.
 * @param sourceElement Element to bind with the editor instance.
 */
export default function secureSourceElement(editor, sourceElement) {
    if (sourceElement.ckeditorInstance) {
        /**
         * A DOM element used to create the editor (e.g.
         * {@link module:editor-inline/inlineeditor~InlineEditor.create `InlineEditor.create()`})
         * has already been used to create another editor instance. Make sure each editor is
         * created with an unique DOM element.
         *
         * @error editor-source-element-already-used
         * @param element DOM element that caused the collision.
         */
        throw new CKEditorError('editor-source-element-already-used', editor);
    }
    sourceElement.ckeditorInstance = editor;
    editor.once('destroy', () => {
        delete sourceElement.ckeditorInstance;
    });
}
